Installation Guide
23
Routing
a) Proper tting assembly. Make sure the gasket is installed in the base of the parallel
thread of the tting. If it was not, install the gasket, repeat assembly steps, and test
for leaks again. Gaskets cannot be reused: if it was installed, replace it with a new
gasket and continue to step 2b.
b) Check for any obstructing material (dirt, shavings, jacket, etc.) in assembly. Remove
material and reassemble, checking for leaks again.
c) Integrity of assembly pieces. If the retainer ring or the gasket are cracked, mis-
shapen or otherwise damaged, replace them and repeat assembly.
Note: DO NOT use sealing solution on parallel thread of tting assembly.
4.3 Routing
General Routing Practices
Routing requirements for CSST exible gas pipe can vary by locality. Be sure to conrm the
requirements of the administrative authority for the location where HOME-FLEX® is to be
installed before installing HOME-FLEX®. In general, HOME-FLEX® can be routed:
• Beneath, through, and along side oor and ceiling joists. This is typical for residen-
tial and commercial installations with basements or multi-oor routing.
• Inside hollow interior wall cavities. Routing inside wall cavities is preferred for ver-
tical sections of tubing. Horizontal runs through wall cavities should be avoided to
minimize the need for striker protection from puncture hazards.
• Through approved conduit underground or under building slabs. Under no cir-
cumstances is HOME-FLEX® to be routed underground or under slab unless it is
routed within a nonmetallic water-tight conduit that is at least ½" larger than the
outer diameter (OD) of the CSST tubing. Fittings and joints are not permissible in
such runs—the run must be one unbroken line of tubing. Runs underneath slabs
must be sleeved and vented per local codes.
• Outdoors. When installed outdoors, the yellow jacketing of HOME-FLEX® must be
intact along the entire run. Any areas of exposed tubing are to be wrapped with
self-bonding silicone tape or sleeved to prevent threats from acids or chlorides.
• Along the perimeter of a building. Care must be taken to protect HOME-FLEX®
from mechanical damage when installed along the exterior of a building. If
installed within 6 feet of the ground, HOME-FLEX® tubing must be routed within
a conduit or chase. If installed in a location where the tubing will not be subject
to possible mechanical damage, a conduit is not required, but is recommended.
Careful consideration should be given to route HOME-FLEX® tubing in areas where
mechanical damage is least likely.
Clearance Holes and Notching
Clearance holes for routing tubing through
studs, joists, plates, etc. must have a diameter
at least ½" larger than the outside diameter
of the tubing (Table 4.3). Local codes pertain-
ing to structural members must be followed
when drilling clearance holes—no structural
members should be compromised, weakened
or impaired by cutting, notching, drilling, or otherwise alternating the member.
Routing through holes in joists, rafters or similar wood structures
When HOME-FLEX® tubing is installed through bored holes in joists, rafters, or other wood
structures, the holes should be bored such that the edge of the hole is at least 2 inches from
Table 4.3 Recommended Routing Holes for Installation
of HOME-FLEX® Tubing
Tubing Size Drill Hole Size
½" (13 mm) 1⁄" (35 mm)
¾" (19 mm) 1½" (38 mm)
1" (25 mm) 1¾" (45 mm)